.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: var(--color-ivory);
  border-bottom: var(--border-hairline);
  transition: background-color var(--transition-fast), box-shadow var(--transition-fast);
}

.site-header.is-scrolled {
  background-color: rgba(243, 246, 240, 0.92);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  box-shadow: 0 2px 8px rgba(8, 26, 22, 0.06);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  min-height: 72px;
  padding-block: var(--space-2);
}

.site-header__brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  flex-shrink: 0;
  text-decoration: none;
  color: var(--color-charcoal-slate);
  min-height: var(--tap-target-min);
}

.site-header__brand:hover {
  text-decoration: none;
  color: var(--color-charcoal-slate);
}

.site-header__logo {
  width: 48px;
  height: 48px;
  object-fit: contain;
  display: block;
  flex-shrink: 0;
}

.site-header__brand-text {
  font-family: var(--font-heading);
  font-size: var(--text-h3);
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-heading);
  line-height: 1;
  white-space: nowrap;
}

.site-header__toggle {
  display: none;
  position: relative;
  width: var(--tap-target-min);
  height: var(--tap-target-min);
  padding: 0;
  border: 1px solid var(--color-pearl-grey);
  border-radius: var(--radius-small);
  background-color: transparent;
  color: var(--color-charcoal-slate);
  transition: border-color var(--transition-fast), background-color var(--transition-fast);
}

.site-header__toggle:hover {
  border-color: var(--color-champagne-gold);
  background-color: var(--color-alabaster);
}

.site-header__toggle:focus-visible {
  outline: 2px solid var(--color-champagne-gold);
  outline-offset: 2px;
}

.site-header__toggle-icon,
.site-header__toggle-icon::before,
.site-header__toggle-icon::after {
  display: block;
  position: absolute;
  left: 50%;
  width: 20px;
  height: 2px;
  background-color: currentColor;
  border-radius: 2px;
  transition: transform var(--transition-fast), top var(--transition-fast), opacity var(--transition-fast);
}

.site-header__toggle-icon {
  top: 50%;
  transform: translate(-50%, -50%);
}

.site-header__toggle-icon::before {
  content: '';
  top: -6px;
  transform: translateX(-50%);
}

.site-header__toggle-icon::after {
  content: '';
  top: 6px;
  transform: translateX(-50%);
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-icon {
  background-color: transparent;
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-icon::before {
  top: 0;
  transform: translateX(-50%) rotate(45deg);
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-icon::after {
  top: 0;
  transform: translateX(-50%) rotate(-45deg);
}

.site-header__nav {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-shrink: 1;
  min-width: 0;
}

.site-header__nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  list-style: none;
  margin: 0;
  padding: 0;
  flex-shrink: 1;
  min-width: 0;
}

.site-header__nav-item {
  margin: 0;
  padding: 0;
  flex-shrink: 0;
}

.site-header__nav-link {
  display: inline-flex;
  align-items: center;
  min-height: var(--tap-target-min);
  padding: var(--space-1) var(--space-2);
  font-size: var(--text-small);
  font-weight: var(--weight-medium);
  line-height: var(--leading-small);
  color: var(--color-charcoal-slate);
  text-decoration: none;
  white-space: nowrap;
  border-radius: var(--radius-small);
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.site-header__nav-link:hover {
  color: var(--color-cognac);
  background-color: var(--color-alabaster);
  text-decoration: none;
}

.site-header__nav-link:focus-visible {
  outline: 2px solid var(--color-champagne-gold);
  outline-offset: 2px;
}

.site-header__cta {
  flex-shrink: 0;
  white-space: nowrap;
}

@media (max-width: 1024px) {
  .site-header__inner {
    flex-wrap: wrap;
    gap: var(--space-2);
  }

  .site-header__brand {
    margin-inline-end: auto;
  }

  .site-header__toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .site-header__nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    width: 100%;
    max-height: calc(100vh - 72px);
    overflow-y: auto;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background-color: var(--color-ivory);
    border-bottom: var(--border-hairline);
    box-shadow: 0 8px 24px rgba(8, 26, 22, 0.12);
    padding: var(--space-3) var(--container-padding) var(--space-4);
    z-index: 999;
  }

  .site-header__nav.is-open {
    display: flex;
  }

  .site-header__nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    width: 100%;
  }

  .site-header__nav-item {
    width: 100%;
  }

  .site-header__nav-link {
    display: flex;
    width: 100%;
    padding: var(--space-3) var(--space-2);
    font-size: var(--text-body);
    line-height: var(--leading-body);
    border-bottom: var(--border-hairline);
  }

  .site-header__nav-link:last-child {
    border-bottom: none;
  }

  .site-header__cta {
    margin-top: var(--space-3);
    width: 100%;
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .site-header__inner {
    min-height: 64px;
  }

  .site-header__logo {
    width: 40px;
    height: 40px;
  }

  .site-header__brand-text {
    font-size: var(--text-h3);
  }

  .site-header__nav {
    max-height: calc(100vh - 64px);
  }
}